/** Test of reset method, of class TernarySearchTree. */
 @Test
 public void testReset() {
   System.out.println("reset");
   TernarySearchTree instance = new TernarySearchTree();
   ArrayList<String> strings = randomStrings();
   for (String s : strings) {
     instance.add(s);
   }
   instance.reset();
   for (String s : strings) {
     assertTrue(!instance.contains(s));
   }
 }
 @Override
 public void reset() {
   tree.reset();
 }